Bump flask from 3.1.2 to 3.1.3

Bumps [flask](https://github.com/pallets/flask) from 3.1.2 to 3.1.3.
- [Release notes](https://github.com/pallets/flask/releases)
- [Changelog](https://github.com/pallets/flask/blob/main/CHANGES.rst)
- [Commits](pallets/flask@3.1.2...3.1.3)

---
updated-dependencies:
- dependency-name: flask
  dependency-version: 3.1.3
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

poetry.lock

@@ -21,7 +21,7 @@ build-backend = "poetry.core.masonry.api"
 
 [tool.poetry.dependencies]
 python = "^3.13"
-flask = {extras = ["async"], version = "^3.1.1"}
+flask = {extras = ["async"], version = "^3.1.3"}
 httpx = "^0.28.1"
 yarl = "^1.18.3"
 pydantic = "^2.12.5"